TOPIC: Please Help with my Packet Tracer activity on 3 cities

Hi everyone i have a problem with my packet tracer activity.. i got this giant diagram of three cities: Sydney, Melbourne and Adelaide
where each city is connected to a large network. Melbourne is tha head quarters with 1 router, 1 switch,3 pcs and a DNS server. Sydney and Adelaide each contain 1 switch, 1 router and 2 pcs. my problem is that i can ping from Sydney to Melbourne, but i cannot ping to Adelaide from anywhere. i always get destination host unreachable.. Please help
this is what i mean

@ Nevins I tried ping from PC0 to PC4, but i still got destination unreachable.

The other thing is i set up two serial connections in router 1(Melbourne) Serial2/0 for Sydney and serial3/0 for Adelaide , serial2/0 work perfectly. but i when i type in show ip route on router2(Adelaide) it doesn’t show the serial3/0 connection..

is there any way i could upload the packet tracer activity to you...??

and thanks for the tip I will remember that when i upload images again.

Hi Navins
Well this is not my project it is one of my friend's project. i tried to help him but it did'nt work. Accoding to him Sydney and Melbourne netwokrs were pre-established and he was given the task to setup the Adelaide network which I am having toruble with. I can ping from all PC in Sydney to all PC in melbourne vice versa. but the main problem is the network in Adelaide i can not ping from there to Sydney or Melbourne. I think it got to do with the Adelaide router configuration.